Patient Satisfaction and Oral Health-Related Quality of Life for Four Implant-Assisted Mandibular Overdentures Fabricated with CAD/CAM Milled Poly Methyl Methacrylate, CAD/CAM Milled Poly Ether Ether Keton, or Conventional Poly Methyl Methacrylate. A Cross-Over Clinical Trial.

Abstract

New materials for overdenture base construction were evolved. Thus, more clinical trials are needed to validate these materials. This study was aimed to compare the difference between CAD/CAM milled Poly methyl methacrylate (PMMA), Poly Ether Ether Keton (PEEK), and conventional mandibular implant assisted overdentures regarding patient satisfaction and oral health-related quality of life (OHRQL). This randomized, crossover, clinical study included 18 completely edentulous subjects rehabilitated with three mandibular implant-assisted overdentures with three different denture base materials opposing a maxillary single denture. These materials were: CAD/CAM milled PMMA, CAD/CAM milled PEEK, and conventional PMMA. Every participant first received each mandibular overdenture in a random manner. After six months of each overdenture use, patient satisfaction and oral health-related quality of life were assessed using Visual Analog Scale (VAS) and Oral Health Impact Profile (OHIP-EDENT-19) respectively, then cross-over to other groups was done. The same was repeated to the last group. Comparison of VAS and OHIP-EDENT-19 between groups were done using Kruskal Wallis test followed by Bonferroni test. Regarding all the VAS items, there were statistically significant higher scores for CAD/CAM Milled PMMA, and PEEK than conventional PMMA base except for speech, esthetic, smell. Regarding OHIP-EDENT-19, many items revealed statistically lower problems scores for CAD/CAM milled PMMA, and CAD/CAM milled PEEK than conventional PMMA base except psychological discomfort, psychological disability and social disability. Within the limit of this study, CAD/CAM milled PMMA, and CAD/CAM milled PEEK were recommended as implant-assisted overdenture bases as it revealed higher patient satisfaction and better oral health-related quality of life in comparison to conventional PMMA implant- assisted overdenture.